3Ni L M,Liu Y H,Lau Y C,et al.LANDMARC:Indoor locationsensing using active RFID[C]//Proceedings of the First IEEEInternational Conference,2003:407-415.
4Awad A,Frunzke T,Dressler F.Adaptive distance estimationand localization in WSN using RSSI Measures[C]//10thEuromicro Conference on Digital System DesignArchitectures,Methods and Tools,2007:471-478.
5Microchip.PIC16F87XA Data Sheet[EB/OL].(2001).http://www.microchip.com/downloads/en/DeviceDoc/30292.pdf.
